CN222017069U - Radiating fin structure for motor controller - Google Patents

Abstract

The utility model discloses a radiating fin structure for a motor controller, wherein a heat-conducting gasket is arranged at the bottom of the controller, radiating fins are stuck to the lower end of the heat-conducting gasket, two sides of each radiating fin are fixedly connected with the bottom of the controller, each radiating fin comprises a radiating body, a bending part and a convex part which are integrally formed, a hollowed-out area is arranged in the middle of the radiating body, and downward and outward bending parts are arranged at two sides of the hollowed-out area; the heat dissipation body is provided with a convex part. The utility model can be adaptively arranged on the controller to radiate heat of the heating device on the controller, can ensure that the controller can continuously and stably work, can not reduce the performance and the service life due to overhigh temperature, has lighter overall mass, simple assembly mode, lower manufacturing and production cost, is convenient for the production and the processing of enterprises and has better economic benefit.

Description

Radiating fin structure for motor controller

Technical Field

The utility model relates to the technical field of controller heat dissipation devices, in particular to a heat dissipation fin structure for a motor controller.

Background

The motor controller is an integrated circuit which actively works to control the motor to run according to the set direction, the rotating speed, the protection strategy and the like, when the motor controller works, part of components are heated due to the power consumption problem, the temperature rise exists, the performance and the service life of the components can be reduced, even the components are directly damaged irreversibly, and finally the service life of the controller is reduced.

In conventional design, some motor controllers can install die-casting shaping radiating block, carries out supplementary heat dissipation to the controller, and die-casting shaping radiating block has following not enough among the prior art: the heat dissipation block is made of ADC12, and the heat conductivity coefficient is 96-105W/(m x k); due to the limitation of the forming process, the risk of sand holes exists in the heat dissipation block, so that the heat dissipation effect can be reduced; because of the technological limit of the forming die, the die-casting forming radiating block is generally large in mass, and is unfavorable for the light weight and cost of the product; the die casting molding production efficiency is relatively low, and the post-treatment such as flash removal is usually needed after molding, so that the production cost is high.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a radiating fin structure for a motor controller.

The utility model provides the following technical scheme: a heat sink structure for a motor controller, comprising a controller, characterized in that: the heat-conducting gasket is arranged at the bottom of the controller, the radiating fins are stuck to the lower end of the heat-conducting gasket, two sides of each radiating fin are fixedly connected with the bottom of the controller, each radiating fin comprises a radiating body, a bending part and a convex part which are integrally formed, a hollowed-out area is arranged in the middle of the radiating body, and the bending parts downwards and outwards are arranged at two sides of the hollowed-out area; the heat dissipation body is provided with a convex part.

Preferably, the bending part comprises a left bending part and a right bending part, the left bending part and the right bending part are respectively and outwards extended in a right angle shape, the height of the vertical direction of the left bending part is consistent with the height of the vertical direction of the right bending part, and the horizontal extension width of the left bending part is smaller than the horizontal extension width of the right bending part.

Preferably, the horizontal extension width of the left bending piece and the right bending piece does not exceed the edge of the heat dissipation body.

Preferably, the back of the heat dissipation body is provided with two reinforcing ribs which protrude downwards and are asymmetric, and the reinforcing ribs are arranged at the upper end and the lower end of the left bending piece at intervals.

Preferably, the heat dissipation body is provided with an avoidance groove.

Preferably, the convex part comprises convex points and convex pieces, and the front surface of the heat dissipation body is provided with a plurality of convex points; the heat dissipation body corner is equipped with 4 groups of lugs respectively, set up the pilot hole on the lug, pilot hole lower extreme and tensile post hole integrated into one piece.

Preferably, the heat sink is made of AL1050.

Preferably, the controller is provided with 4 screw holes corresponding to the assembly holes, and the screw holes are fixedly connected with the assembly holes through screws.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the heat-conducting gasket is arranged at the bottom of the controller, the radiating fin is stuck to the lower end of the heat-conducting gasket, two sides of the radiating fin are fixedly connected with the bottom of the controller, the radiating fin comprises a radiating body, a bending part and a convex part which are integrally formed, the middle part of the radiating body is provided with a hollowed-out area, and two sides of the hollowed-out area are provided with downward and outward bending parts; the heat dissipation body is provided with a convex part. The utility model can be adaptively arranged on the controller to radiate heat of the heating device on the controller, can ensure that the controller can continuously and stably work, can not reduce the performance and the service life due to overhigh temperature, has lighter overall mass, simple assembly mode, lower manufacturing and production cost, is convenient for the production and the processing of enterprises and has better economic benefit.

(2) The arrangement of the bending part can effectively improve the utilization rate of stamping materials and reduce the cost of production materials, and the areas of the left bending piece and the right bending piece are proper, so that heat generated by the controller in the using process is conveniently radiated outwards through the radiating fins, and the radiating efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an exploded view of the present utility model;

FIG. 4 is a schematic diagram of a heat sink according to the present utility model;

FIG. 5 is a second schematic diagram of a heat sink according to the present utility model;

FIG. 6 is a simulated analysis chart of the controller CAE without the radiating fins;

FIG. 7 is a simulated analysis of a controller CAE of the present utility model with a heat sink mounted thereon.

Detailed Description

As shown in fig. 1 to 5, a fin structure for a motor controller includes a controller 1, a heat conductive pad 2, a fin 3, a heat dissipating body 4, a bent portion 5, a convex portion 6, a hollowed-out area 7, a left bent member 8, a right bent member 9, a reinforcing rib 10, a relief groove 11, a bump 12, a protruding piece 13, an assembly hole 14, a stretching column hole 15, a screw hole 16, and a screw 17.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, a heat conducting gasket 2 is arranged at the bottom of the controller 1, a heat radiating fin 3 is attached to the lower end of the heat conducting gasket 2, and a gap between the controller 1 and the heat radiating fin 3 is filled by using the compressibility of the heat conducting gasket 2, so that the heat resistance is reduced, and the heat conducting effect is improved. And also serves as an electrical insulation between the heat sink 3 and the controller 1. The two sides of the radiating fin 3 are fixedly connected with the bottom of the controller 1, the radiating fin 3 is made of AL1050, the heat conductivity coefficient of the radiating fin is 237W/(m.k), and the heat conductivity coefficient of the radiating fin is 105W/(m.k) compared with the ADC12 made of the material used for producing the radiating fin by the traditional die casting process, and the radiating fin has obvious heat conductivity. The fin 3 of this embodiment can be adapted to install on the controller 1, dispel the heat to the device that generates heat on the controller 1, can ensure that the controller can last stable work, can not lead to performance and life-span to drop because of the high temperature to the overall quality is lighter, and assembly method is simple and convenient, and manufacturing cost is lower, and the enterprise of being convenient for produces processing, economic benefits is better.

The radiating fin 3 comprises an integrally formed radiating body 4, a bending part 5 and a convex part 6, wherein the hollow area 7 is arranged in the middle of the radiating body 4, the hollow area 7 is convenient for placing part of components on the controller 1 and preventing the controller 1 from being in direct contact with the radiating fin 3, so that short circuit is avoided.

The two sides of the hollowed-out area 7 are provided with downwards and outwards bent parts 5, and the bent parts 5 are positioned below the heating components of the controller 1, so that the heat of the controller 1 can be quickly and efficiently conducted downwards. Specifically, the bending part 5 comprises a left bending part 8 and a right bending part 9, the left bending part 8 and the right bending part 9 are respectively and outwards extended in a right angle shape, the height of the vertical direction of the left bending part 8 is consistent with the height of the vertical direction of the right bending part 9, the horizontal extension width of the left bending part 8 is smaller than the horizontal extension width of the right bending part 9, and the horizontal extension widths of the left bending part 8 and the right bending part 9 do not exceed the edge of the heat dissipation body 4, so that the left bending part 8 and the right bending part 9 are conveniently assembled into the shell of the controller 1 together. The arrangement of the bending part 5 can effectively improve the utilization rate of stamping materials and reduce the cost of production materials, and the area sizes of the left bending part 8 and the right bending part 9 are proper, so that the heat generated in the using process of the controller 1 is conveniently radiated outwards through the radiating fins 3, and the radiating efficiency is improved.

The back of the radiating body 4 is provided with two reinforcing ribs 10 which protrude downwards and are asymmetric, the reinforcing ribs 10 are arranged at the upper end and the lower end of the left bending piece 8 at intervals, the local strength of the radiating fin 3 can be effectively enhanced, the flatness of the radiating fin 3 is maintained, and the subsequent assembly is convenient.

The heat dissipation body 4 is provided with a convex part 6, the convex part 6 comprises convex points 12 and convex pieces 13, and the front surface of the heat dissipation body 4 is provided with a plurality of convex points 12; the corner of the heat dissipation body 4 is respectively provided with 4 groups of protruding pieces 13, the protruding pieces 13 are provided with assembly holes 14, and the lower ends of the assembly holes 14 and the stretching column holes 15 are integrally formed. The bumps 12 and the tabs 13 are used for assembling and supporting the controller 1 (because the back surface of the PCB of the controller 1 has no metal points with electrical characteristics at the supporting position), ensuring that a certain electrical insulation gap exists between the heat sink 3 and the controller 1, and ensuring that the heat conducting gasket 2 is in a certain acceptable compression range, and not causing excessive stress of the controller and mechanical breakage of the heat conducting gasket 2 itself due to excessive compression.

The heat dissipation body 4 is provided with the avoidance groove 11, and as a plurality of metal components exist on the PCBA board of the controller 1, the avoidance groove 11 can avoid short circuit caused by direct contact between the metal components on the controller 1 and the heat dissipation fin 3.

4 Screw holes 16 corresponding to the assembly holes 14 are formed in the controller 1, the screw holes 16 are fixedly connected with the assembly holes 14 through screws 17, and in the assembly process, the length of the stretching column holes 15 can meet the locking length of the screws 17, so that the screws 17 are ensured to have proper fastening force. The assembly holes 14 are punched without tapping, the screws 17 can be directly assembled, and the assembly production efficiency is greatly improved.

As shown in fig. 6 to 7, the temperature rise of each heating element is set to 105 ℃, the current is 30±0.2A, and the voltage is 14.8±0.2V (which simulates the actual working condition of the controller 1), and according to the theoretical power consumption of each heating element, the temperature rise of each heating element is compared with the temperature rise of each heating element when the controller 1 is assembled with the cooling element 3 of the present utility model, and the analysis results are shown in the following table, wherein the temperature rise index of the assembled cooling element 3 is 42.49% -47.62% of the cooling element 3, and the heat dissipation effect on the controller 1 is remarkable.

In actual detection, the temperature rise of each heating device is compared under the conditions that the set environment temperature is 105 ℃, the current is 30+/-0.2A, and the voltage is 14.8+/-0.2V (the actual working condition temperature of the analog controller), the temperature rise of each heating device is compared under the conditions that the test controller 1 is free of cooling fins 3 and is assembled with cooling fins 3, the test results are shown in the following table II, the temperature rise index of the controller 1 assembled with the cooling fins 3 is 38.3% -49.09% without cooling fins 3, no obvious difference exists between the temperature rise index and the analog effect of the table I, and the heat dissipation effect of the controller 1 is quite remarkable.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims (8)

1. A heat sink structure for a motor controller, comprising a controller (1), characterized in that: a thermally conductive pad (2) is provided at the bottom of the controller (1), a heat sink (3) is attached to the lower end of the thermally conductive pad (2), both sides of the heat sink (3) are fixedly connected to the bottom of the controller (1), the heat sink (3) comprises an integrally formed heat sink body (4), a bent portion (5) and a convex portion (6), a hollow area (7) is provided in the middle of the heat sink body (4), and downwardly facing outwardly bent portions (5) are provided on both sides of the hollow area (7); and a convex portion (6) is provided on the heat sink body (4). 2. A heat sink structure for a motor controller according to claim 1, characterized in that: the bending portion (5) includes a left bending part (8) and a right bending part (9), the left bending part (8) and the right bending part (9) both extend outward at right angles, the vertical height of the left bending part (8) is consistent with the vertical height of the right bending part (9), and the horizontal extension width of the left bending part (8) is smaller than the horizontal extension width of the right bending part (9). 3. A heat sink structure for a motor controller according to claim 2, characterized in that the horizontal extension widths of the left bending piece (8) and the right bending piece (9) do not exceed the edge of the heat dissipation body (4). 4. A heat sink structure for a motor controller according to claim 3, characterized in that: two downwardly protruding and asymmetrical reinforcing ribs (10) are provided on the back of the heat dissipation body (4), and the reinforcing ribs (10) are spaced apart at the upper and lower ends of the left bending part (8). 5. A heat sink structure for a motor controller according to claim 1 or 2, characterized in that a relief groove (11) is provided on the heat dissipation body (4). 6. A heat sink structure for a motor controller according to claim 5, characterized in that: the convex portion (6) includes a convex point (12) and a convex piece (13), and the front side of the heat dissipation body (4) is provided with a plurality of convex points (12); the edges and corners of the heat dissipation body (4) are respectively provided with four groups of convex pieces (13), and the convex pieces (13) are provided with assembly holes (14), and the lower end of the assembly hole (14) is integrally formed with the tensile column hole (15). 7. A heat sink structure for a motor controller according to claim 6, characterized in that the heat sink (3) is made of AL1050. 8. A heat sink structure for a motor controller according to claim 6, characterized in that: the controller (1) is provided with four screw holes (16) corresponding to the assembly holes (14), and the screw holes (16) and the assembly holes (14) are fixedly connected by screws (17).